1 s ::= ws grammar ws => "gram"
4 grammar ::= r +/ ws => "grammar"
6 r ::= word ^"::=" alternatives /ws
7 | word ^"!::=" alternatives /ws
9 alternatives ::= (conjuncts +/ (ws "|" ws)) +/ (ws ">" ws)
11 conjuncts ::= sequence
12 | sequence ^"&" e*/ws /ws
13 | sequence ^"&~" e*/ws /ws
16 | (e+/ws ws)? "^" quoted (ws e+/ws)? => "ps2"
19 psx ::= psy ^"?=>" e /ws
22 sequence ::= quoted => "qprod"
24 | psx ^"=>" (word|quoted) /ws
29 range ::= ec => "range"
32 e ::= word => "nonTerminal"
35 | ^"{" sequence "}" /ws
39 | (e ^"++" /ws > e ^"+" /ws)
40 | (e ^"++/" e /ws > e ^"+/" e /ws)
41 | (e ^"**" /ws > e ^"*" /ws)
42 | (e ^"**/" e /ws > e ^"*/" e /ws)
46 > ^"(" alternatives ")" /ws
51 word ::= [a-zA-Z0-9_]++
52 quoted ::= "\"" (([~\"\\] | escaped)+) "\""
54 escaped ::= "\\n" => "\n"